Differential-gear mechanism.



. j. NLDENNING..

DIFFERENTIAL GEAR MECHANISM. -APFLlcATloN riLED MAR.'23, :916.

UNITED STATES PATENT OFFICE.

JOSEPH M. DENN IN G OF CEDAR RAPIDS, IOWA, ASSIGNOR T0 DENNING TRACTOR i COMPANY, OF CEDAR-RAPIDS, IOWA, A CORPORATION' 0F IOWA.

DIFFERENTIAL-GEAR MECHAN ISM.

Specification oi Letters Patent.

Original application filed September 4, 1915, Serial No. 49,099. Divided and this application led March 23, 1916. Serial No. 86,083.

To all whom it 'may concern.'

Be it known that I, JOSEPH M. DENNING,

acitizen of the United States, residingatjaclt shaft, the construction of the gearing being such that the gears are entirely detached from and operate independentlyof the shaft, the shaft being removable independently of the gear, thereby not only lessening the cost of manufacture by dis.- pensing with the use of keys and fastening devices, but the assembling of the parts is facilitated. j

A further object is to provide animproved .form of differential gearing having Y combined therewith a brake applying surface.

To the attainment of these ends and the accom-plishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially 'the construction, combination and larrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawings illustrating the invention and in which:

Figure l is a vertical sectional view of the differential gearing and brake drum.

F ig. 2 is a view taken on' line 4.-/l, Fig. 1. Referring more particularly to the dra-wings, the numeral 2i designates a shaft commonly known as a jack shaft which sup- )orts the differential gearing, and which iatter 'preferably comprises a ring gear 25, and constitutes the driving member. This ring gear 1is secured to a spider 26, also ro tatably supported by the. shaft 2i. Rotatably supported by the spider are a plurality of bevel pinions 27, preferably four in number, vwhich rotate with the 'spider about the shaft 2i, and also rot-ate independently with 'respect to the spider on an axis arranged transversely to the axis of rotation of the spider. These bevel pinions 27 mesh with bevel gears 28, 29 arrangedgon each side of the spider 26 and rotate about the shaft 24:, Each of the gea-rs 28, 29 is provided with jaws 30, 31 on the outer faces of their hubs, and with which jaws, coperating jaws 32, carried by pinions 34, 35, mesh. These pinions 34:, 35 are also rotatably supported by the shaft 2iand the jaws on the pinions are held in Contact with the jaws on the bevel gears by means of the walls 36, 3? of the gear casing.

The shaft 24 is held against longitudinal displacement in any suitable manner preferably by means of caps 38, which are secured to the bearing 39 in which the shaft is journale-d, and gaskets 40 may be provided to form a fluid tight connection o'r jointv between the cap and bearing so that Vthe gear casing will be liquid'tight, thereby rendering it possible to till the casing with lubricant in which the gearsrotate.-

The gear 28 is provided with a flange 4,1 and the gear 29 is provided with a ange42f 'the peripheries of which fare preferably arranged in line with the bot-tom of the teeth of the respective gears and form brake drums around each of which a brake band extends. l While the preferred form of construction has been herein'shown and described, it is to be understood that many changes may be made in the details thereof, without del parting from t-he spirit of this invention.

That is claimedas new is:

A differential gearing embodying a shaft, a gear freely rotatable about the shaft, pinions supported by the gear within the periphery thereof for rotation with the gear and for independent rotation with respect to the gear and about axes transverse to the axis of rotation of the support-ing gear, abrake drum rotatable about the shaft on each side of the first said gear, said: drum having lateral teeth meshing with the said Patented Sept. 24, 191s. t

p'nons, pinions also rotatable vabout the name. to this specicaton'g 'in the presence shaft adjacent the outer face of each of the of two subscribing witnesses, om this 17th 10 drums. and ntereugugng means on the last day of March A. D. 1916. roctegl Pvinlons gull lthe ljespective adjacent JOSEPH BL DENNING. drumv lor lookmg the gear and drum together, the said shaft being freely removable Tit-messes: Wholly o1' partially from the Said parts. vA. H. BECKMAN,

In testimony whereof I have signed my H. A. HOFFERD.

Copies of chie potent may be obtained for ve cents each, by addressing the Gommisvsionexl of Patents.

' Washington, D. C. 

